E007 on IR2016/2020 more than often indicates problems with fixing unit.
Remove the fixing unit from your machine and
have a look on it just to check the condition of the fixing film itself.
If you find any defect on it, don'tworry. Just buy a new one (fixing film) and replace it. I think thereafter your machine will be ok.
To prevent this problem in future, make sure you always release jummed paper on fixing assembly by pulling the paper release lever (lightgreen).
Fundi Eddy, Tanzania., August 2009